When scrolling down the page, the sticky content moves over the nav menu.
I’ve tried putting sticky content into a margin stack with a large top margin. That prevents the sticky content obscuring the nav menu but it does leaves a large gap below the banner when the page opens before scrolling down.
Thanks Adam
Turning off sticky nav did the trick - at least on devices other than phones where the page appears as a bit of a mess.
More work to be done.
All the best